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《三塔合一间接空冷塔结构优化研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第59卷第4期汽轮机技术Vol.59No.42017年8月TURBINETECHNOLOGYAug.2017三塔合一间接空冷塔结构优化研究赵文升,郭浩,宋百川(华北电力大学电站设备状态监测与控制教育部重点实验室,保定071003)摘要:建立了600MW三塔合一间接空冷塔的数学模型,通过数值模拟探究结构参数对热力性能的影响规律,并以进塔风量和出塔水温为评价标准,获得了最优的结构参数。研究结果表明:随着出口直径或喉部直径的增大,热力性能先增强后减弱;无风工况下,随着喉部高度的增大,热力性能先增强后减弱,
2、4m/s工况与之相反;随着塔高度的增大,热力性能持续增强;随着排烟高度或烟囱直径的改变,热力性能的变化并不大;随着脱硫塔直径的增大,热力性能继续减弱;当出口直径与零米直径的比值R1/R2=0.8~0.85,喉部直径与零米直径的比值R0/R2=0.6~0.65时,空冷塔热力性能最优。关键词:三塔合一;间接空冷塔;结构参数;热力性能;进塔风量;出塔水温分类号:TK264文献标识码:A文章编号:1001-5884(2017)04-0257-04StructrueOptimizationforanIndir
3、ectAirCoolingTowerwithThreeIncorporateTowersZHAOWen-sheng,GUOHao,SONGBai-chuan(MOE'sKeyLabofConditionMonitoringandControlforPowerPlantEquipment,NorthChinaElectricPowerUniversity,Baoding071003,China)Abstract:Anumericalmodelwasestablishedfora600MWindirec
4、taircoolingtowerwiththreeincorporatetowers.Theparameterswhichdeterminethestructurewereinvestigatedusingnumericalcalculation.Theirinfluencesonthethermalperformancewerestudiedindetailswithinletairquantityandoutletwatertemperatureforevaluationindex.Thebes
5、tparameterswereacquired.Theresultsindicate:whenoutletdiameterorthroatdiameterincreases,thethermalperformancewillincreasefirst,butasoutletdiameterorthroatdiameterincreasingtosomevaluethethermalperformancebeginstodecrease.Whenthereisnocrosswind,thetherma
6、lperformancewillincreasefirstlyandthendecreasewiththeincreaseofthroatheight,asthecrosswindvelocityis4m/s,thechangelawisopposite.Withtheincreaseoftowerheight,thethermalperformancecontinuestoincrease.Theinfluenceoftheheightoffluegasorchimneydiameteronthe
7、thermalperformancecanbenegligible.Withtheincreaseofthediameterofdesulfidationtower,thethermalperformancecontinuestodecrease.WhiletheratioofoutletdiametertobasediameterR1/R2=0.8~0.85,andtheratioofthroatdiametertobasediameterR0/R2=0.6~0.65,theaircoolingt
8、owerachievesoptimalthermalperformance.Keywords:threeincorporatetowers;indirectaircoolingtower;structuralparameters;thermalperformance;inletairquantity;outletwatertemperatur三塔合一结构塔内的气体流动比较复杂,气体流动状态0前言影响着热力性能。所以,三塔合一间接空冷塔结构的优化研究十分重要。本文建立数
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